QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

6 km SSE of Freeport, Kansas

· 3.9 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 22 kmSumner County 30 kmGrant County 40 kmKingman County 53 kmAlfalfa County 65 kmSedgwick County 67 kmKay County 71 kmBarber County 77 kmGarfield County 86 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.6 (ml)
Depth
3.9 km below the surface
Felt
no reports yet
Nearest
Harper County, 22 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3598 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 37.1498, -97.8183. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 22 km (14 mi) E of here earthquakes near Harper County
Sumner County, KS 30 km (19 mi) WSW of here earthquakes near Sumner County
Grant County, OK 40 km (25 mi) N of here earthquakes near Grant County
Kingman County, KS 53 km (33 mi) SSE of here earthquakes near Kingman County
Alfalfa County, OK 65 km (40 mi) NE of here earthquakes near Alfalfa County
Sedgwick County, KS 67 km (42 mi) SSW of here earthquakes near Sedgwick County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

58 earthquakes have been recorded within 50 km since this one.

  1. 3.0 3 km SSE of Danville, Kansas
  2. 2.0 5 km WSW of Bluff City, Kansas
  3. 2.5 3 km SSE of Danville, Kansas
  4. 2.5 6 km E of Renfrow, Oklahoma
  5. 1.9 10 km NNW of Caldwell, Kansas
  6. 1.5 7 km SSW of Anthony, Kansas
  7. 1.5 9 km NNW of Caldwell, Kansas
  8. 1.5 4 km NW of Harper, Kansas
  9. 1.9 3 km NNW of Freeport, Kansas
  10. 1.8 2 km E of Anthony, Kansas
  11. 1.9 9 km SSE of Milan, Kansas
  12. 1.6 3 km SW of Harper, Kansas
  13. 2.6 9 km E of Manchester, Oklahoma
  14. 2.2 11 km W of Belle Plaine, Kansas
  15. 2.3 9 km WNW of Belle Plaine, Kansas

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.